Russian authorities have approved the first xenotransplantation treatment – the implanting of animal cells into the human body – for sale in that country, marking the first time such a treatment has been appoved anywhere. The type 1 diabetes treatment involves inserting insulin-producing pig cells coated in seaweed into the human pancreas to replace native cells that have been depleted there. [...] The seaweed coating keeps the bodies immune system from attacking the foreign animal cells.